Against the backdrop of the global energy transition, China's abundant biomass resources present a strategic opportunity for the development of clean energy. Building on biogas, the extension of bio-methane and green methanol not only offers economic and carbon reduction advantages but also aligns with the green transition needs of global industries such as shipping. Currently, the biogas industry still faces development bottlenecks such as scattered raw materials and small scale, but by establishing a full industrial chain model of "raw material collection-on-site conversion-diversified utilization" tailored to local conditions, these challenges can be overcome. Such explorations may transform China's resource potential into high-value green fuels with global competitiveness, thereby contributing to the achievement of the "dual carbon" goals.